Alexandre Lision | 744f742 | 2013-09-25 11:39:37 -0400 | [diff] [blame] | 1 | /*********************************************************************** |
| 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 | Redistribution and use in source and binary forms, with or without |
| 4 | modification, are permitted provided that the following conditions |
| 5 | are met: |
| 6 | - Redistributions of source code must retain the above copyright notice, |
| 7 | this list of conditions and the following disclaimer. |
| 8 | - Redistributions in binary form must reproduce the above copyright |
| 9 | notice, this list of conditions and the following disclaimer in the |
| 10 | documentation and/or other materials provided with the distribution. |
| 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| 12 | names of specific contributors, may be used to endorse or promote |
| 13 | products derived from this software without specific prior written |
| 14 | permission. |
| 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” |
| 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 | POSSIBILITY OF SUCH DAMAGE. |
| 26 | ***********************************************************************/ |
| 27 | |
| 28 | #ifndef SILK_MAIN_FIX_H |
| 29 | #define SILK_MAIN_FIX_H |
| 30 | |
| 31 | #include "SigProc_FIX.h" |
| 32 | #include "structs_FIX.h" |
| 33 | #include "control.h" |
| 34 | #include "main.h" |
| 35 | #include "PLC.h" |
| 36 | #include "debug.h" |
| 37 | #include "entenc.h" |
| 38 | |
| 39 | #ifndef FORCE_CPP_BUILD |
| 40 | #ifdef __cplusplus |
| 41 | extern "C" |
| 42 | { |
| 43 | #endif |
| 44 | #endif |
| 45 | |
| 46 | #define silk_encoder_state_Fxx silk_encoder_state_FIX |
| 47 | #define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FIX |
| 48 | #define silk_encode_frame_Fxx silk_encode_frame_FIX |
| 49 | |
| 50 | /*********************/ |
| 51 | /* Encoder Functions */ |
| 52 | /*********************/ |
| 53 | |
| 54 | /* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */ |
| 55 | void silk_HP_variable_cutoff( |
| 56 | silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */ |
| 57 | ); |
| 58 | |
| 59 | /* Encoder main function */ |
| 60 | void silk_encode_do_VAD_FIX( |
| 61 | silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */ |
| 62 | ); |
| 63 | |
| 64 | /* Encoder main function */ |
| 65 | opus_int silk_encode_frame_FIX( |
| 66 | silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */ |
| 67 | opus_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */ |
| 68 | ec_enc *psRangeEnc, /* I/O compressor data structure */ |
| 69 | opus_int condCoding, /* I The type of conditional coding to use */ |
| 70 | opus_int maxBits, /* I If > 0: maximum number of output bits */ |
| 71 | opus_int useCBR /* I Flag to force constant-bitrate operation */ |
| 72 | ); |
| 73 | |
| 74 | /* Initializes the Silk encoder state */ |
| 75 | opus_int silk_init_encoder( |
| 76 | silk_encoder_state_Fxx *psEnc /* I/O Pointer to Silk FIX encoder state */ |
| 77 | ); |
| 78 | |
| 79 | /* Control the Silk encoder */ |
| 80 | opus_int silk_control_encoder( |
| 81 | silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk encoder state */ |
| 82 | silk_EncControlStruct *encControl, /* I Control structure */ |
| 83 | const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */ |
| 84 | const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */ |
| 85 | const opus_int channelNb, /* I Channel number */ |
| 86 | const opus_int force_fs_kHz |
| 87 | ); |
| 88 | |
| 89 | /****************/ |
| 90 | /* Prefiltering */ |
| 91 | /****************/ |
| 92 | void silk_prefilter_FIX( |
| 93 | silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ |
| 94 | const silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */ |
| 95 | opus_int32 xw_Q10[], /* O Weighted signal */ |
| 96 | const opus_int16 x[] /* I Speech signal */ |
| 97 | ); |
| 98 | |
| 99 | /**************************/ |
| 100 | /* Noise shaping analysis */ |
| 101 | /**************************/ |
| 102 | /* Compute noise shaping coefficients and initial gain values */ |
| 103 | void silk_noise_shape_analysis_FIX( |
| 104 | silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */ |
| 105 | silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */ |
| 106 | const opus_int16 *pitch_res, /* I LPC residual from pitch analysis */ |
| 107 | const opus_int16 *x /* I Input signal [ frame_length + la_shape ] */ |
| 108 | ); |
| 109 | |
| 110 | /* Autocorrelations for a warped frequency axis */ |
| 111 | void silk_warped_autocorrelation_FIX( |
| 112 | opus_int32 *corr, /* O Result [order + 1] */ |
| 113 | opus_int *scale, /* O Scaling of the correlation vector */ |
| 114 | const opus_int16 *input, /* I Input data to correlate */ |
| 115 | const opus_int warping_Q16, /* I Warping coefficient */ |
| 116 | const opus_int length, /* I Length of input */ |
| 117 | const opus_int order /* I Correlation order (even) */ |
| 118 | ); |
| 119 | |
| 120 | /* Calculation of LTP state scaling */ |
| 121 | void silk_LTP_scale_ctrl_FIX( |
| 122 | silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| 123 | silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| 124 | opus_int condCoding /* I The type of conditional coding to use */ |
| 125 | ); |
| 126 | |
| 127 | /**********************************************/ |
| 128 | /* Prediction Analysis */ |
| 129 | /**********************************************/ |
| 130 | /* Find pitch lags */ |
| 131 | void silk_find_pitch_lags_FIX( |
| 132 | silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| 133 | silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| 134 | opus_int16 res[], /* O residual */ |
| 135 | const opus_int16 x[] /* I Speech signal */ |
| 136 | ); |
| 137 | |
| 138 | /* Find LPC and LTP coefficients */ |
| 139 | void silk_find_pred_coefs_FIX( |
| 140 | silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| 141 | silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| 142 | const opus_int16 res_pitch[], /* I Residual from pitch analysis */ |
| 143 | const opus_int16 x[], /* I Speech signal */ |
| 144 | opus_int condCoding /* I The type of conditional coding to use */ |
| 145 | ); |
| 146 | |
| 147 | /* LPC analysis */ |
| 148 | void silk_find_LPC_FIX( |
| 149 | silk_encoder_state *psEncC, /* I/O Encoder state */ |
| 150 | opus_int16 NLSF_Q15[], /* O NLSFs */ |
| 151 | const opus_int16 x[], /* I Input signal */ |
| 152 | const opus_int32 minInvGain_Q30 /* I Inverse of max prediction gain */ |
| 153 | ); |
| 154 | |
| 155 | /* LTP analysis */ |
| 156 | void silk_find_LTP_FIX( |
| 157 | opus_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */ |
| 158 | opus_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ |
| 159 | opus_int *LTPredCodGain_Q7, /* O LTP coding gain */ |
| 160 | const opus_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */ |
| 161 | const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ |
| 162 | const opus_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */ |
| 163 | const opus_int subfr_length, /* I subframe length */ |
| 164 | const opus_int nb_subfr, /* I number of subframes */ |
| 165 | const opus_int mem_offset, /* I number of samples in LTP memory */ |
| 166 | opus_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */ |
| 167 | ); |
| 168 | |
| 169 | void silk_LTP_analysis_filter_FIX( |
| 170 | opus_int16 *LTP_res, /* O LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */ |
| 171 | const opus_int16 *x, /* I Pointer to input signal with at least max( pitchL ) preceding samples */ |
| 172 | const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */ |
| 173 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag, one for each subframe */ |
| 174 | const opus_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I Inverse quantization gains, one for each subframe */ |
| 175 | const opus_int subfr_length, /* I Length of each subframe */ |
| 176 | const opus_int nb_subfr, /* I Number of subframes */ |
| 177 | const opus_int pre_length /* I Length of the preceding samples starting at &x[0] for each subframe */ |
| 178 | ); |
| 179 | |
| 180 | /* Calculates residual energies of input subframes where all subframes have LPC_order */ |
| 181 | /* of preceding samples */ |
| 182 | void silk_residual_energy_FIX( |
| 183 | opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ |
| 184 | opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */ |
| 185 | const opus_int16 x[], /* I Input signal */ |
| 186 | opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ |
| 187 | const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */ |
| 188 | const opus_int subfr_length, /* I Subframe length */ |
| 189 | const opus_int nb_subfr, /* I Number of subframes */ |
| 190 | const opus_int LPC_order /* I LPC order */ |
| 191 | ); |
| 192 | |
| 193 | /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ |
| 194 | opus_int32 silk_residual_energy16_covar_FIX( |
| 195 | const opus_int16 *c, /* I Prediction vector */ |
| 196 | const opus_int32 *wXX, /* I Correlation matrix */ |
| 197 | const opus_int32 *wXx, /* I Correlation vector */ |
| 198 | opus_int32 wxx, /* I Signal energy */ |
| 199 | opus_int D, /* I Dimension */ |
| 200 | opus_int cQ /* I Q value for c vector 0 - 15 */ |
| 201 | ); |
| 202 | |
| 203 | /* Processing of gains */ |
| 204 | void silk_process_gains_FIX( |
| 205 | silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ |
| 206 | silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */ |
| 207 | opus_int condCoding /* I The type of conditional coding to use */ |
| 208 | ); |
| 209 | |
| 210 | /******************/ |
| 211 | /* Linear Algebra */ |
| 212 | /******************/ |
| 213 | /* Calculates correlation matrix X'*X */ |
| 214 | void silk_corrMatrix_FIX( |
| 215 | const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */ |
| 216 | const opus_int L, /* I Length of vectors */ |
| 217 | const opus_int order, /* I Max lag for correlation */ |
| 218 | const opus_int head_room, /* I Desired headroom */ |
| 219 | opus_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ] */ |
| 220 | opus_int *rshifts /* I/O Right shifts of correlations */ |
| 221 | ); |
| 222 | |
| 223 | /* Calculates correlation vector X'*t */ |
| 224 | void silk_corrVector_FIX( |
| 225 | const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */ |
| 226 | const opus_int16 *t, /* I Target vector [L] */ |
| 227 | const opus_int L, /* I Length of vectors */ |
| 228 | const opus_int order, /* I Max lag for correlation */ |
| 229 | opus_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */ |
| 230 | const opus_int rshifts /* I Right shifts of correlations */ |
| 231 | ); |
| 232 | |
| 233 | /* Add noise to matrix diagonal */ |
| 234 | void silk_regularize_correlations_FIX( |
| 235 | opus_int32 *XX, /* I/O Correlation matrices */ |
| 236 | opus_int32 *xx, /* I/O Correlation values */ |
| 237 | opus_int32 noise, /* I Noise to add */ |
| 238 | opus_int D /* I Dimension of XX */ |
| 239 | ); |
| 240 | |
| 241 | /* Solves Ax = b, assuming A is symmetric */ |
| 242 | void silk_solve_LDL_FIX( |
| 243 | opus_int32 *A, /* I Pointer to symetric square matrix A */ |
| 244 | opus_int M, /* I Size of matrix */ |
| 245 | const opus_int32 *b, /* I Pointer to b vector */ |
| 246 | opus_int32 *x_Q16 /* O Pointer to x solution vector */ |
| 247 | ); |
| 248 | |
| 249 | #ifndef FORCE_CPP_BUILD |
| 250 | #ifdef __cplusplus |
| 251 | } |
| 252 | #endif /* __cplusplus */ |
| 253 | #endif /* FORCE_CPP_BUILD */ |
| 254 | #endif /* SILK_MAIN_FIX_H */ |